Blade sharpening machine



Aug. 16, 19 32. RUNSHANG 1,872,096 I BLADE SHARPENING MACHINE Filed July 1, 1931 4 Sheets-Sheet 1 P I Inventor C By Aug. 16, 1932.-

A. M. RUNSHANG BLADE SHARPENING MACHINE Filed July 1, 1951 4 Sheets-Sheet 2 411% M. puns-2a ng flm Aug. 16, 1932. A.. M. RUNSHANG 1,872,096

BLADE SHARPENING MACHINE Filed July 1, 1951 4 Sheets-Sheet 5 I nvcnlor 16-, 1932. M, RUNSHANG 1,872,096

BLADE SHARPENING MACHINE Filed July 1, 1931 4 Sheets-Sheet 4 Inventor Patented Aug. 16, 1932 UNITED STATES ANTON M. RUNSHANG. or LITTLE ROCK, ARKANSAS I BLADE snAnrmzme MAcnniE Application filed July 1, 1931. Serial 548,200.

The present invention relates to a machine whichis particularly intended for use in sharpening the bladesdor knives of various wood working machines such as planers and 5 joiners, and has for some of its objects to provide a blade sharpening machine of this character which will be comparatively simple in construction, strong, durable, efiicient and reliable in operation and which may be manu- 1 factured at low cost.

All of the foregoing and stillfurther objects and advantages of the invention will become apparent from a study of the following specification, taken in connection with the 15 accompanying drawings whereinlike characters of reference designate corresponding parts throughout the several views,' and wherein Figure 1 is a View in side elevation of an embodiment of thema'chine for sharpening or grinding straight edged blades or knives. Figure 2 is a view in elevation showing the means for mounting a straight edged blade or knife in position. 7

Figure 3 is a view in side elevation of an embodiment of the machine for sharpening or grinding concave edged blades or knives. Figure 4 is a vertical sectional viewtaken substantially on the line-tA of'Figure .3,

30 looking in the direction: indicated by the arrows. I

Figure 5 is a view in side elevation showing an embodiment of the machine for sharpening or grinding convex edged blades or knives.

Figure 6 is a vertical sectional view taken substantially on the line 6-6. of Figure. 5.

Figure 7 is a detail view in elevation showing the means for adjustably mounting the 40 bracket which supports. the straight edged -50 supporting blades 2. On' its upper side the bed 1 is provided with a dovetail slide 3 which is longitudinally slotted, as at 4.

A carriage designated generally by the referencenumeral 5 is mounted for travel on the slide 3 andcomprises a block 6 which is engagedwith said slide 3. The carriage 5 further includes the standards"? having bearings 8 on their upper end in which a horizontal shaft9 is journaled. A sharpening or grinding wheel 10 is fixed on one end of the shaft 9 and a pulley 11 is fixed on the other end of said shaft'9. A drive belt (not shown) is to be trained over the pulley'll foriconnecting the shaft 9 to a suitable source of power. r

A pair of brackets 12 are mounted on the 66 bed 1 adjacent one end of the slide-3 and mounted for swinging movement in a vertical plane therebetween is a sleeve 13 having threaded trunnions projecting from diametrically opposite sides thereof and journaled in openingsprovidedtherefor in the-brackets 12. Retaining nuts 14 are" threaded on the trunnions; In its upper portion,one of the brackets 12 is provided with a series of holes 15 in which a pin 16 is selectively insertable, said pin 16 being engageable in an opening or socket provided therefor, inthe sleeve 13 for securing said sleeve in adjusted position.

A stop lug 17 projects from one side of the sleeve 13'and the purpose of/said stop lug will be presently set forth. o f An inclined bracket 18, having an offset up per end portion 19, is mounted on the sleeve 13 through the medium of a pin 20 which is inserted in said sleeve 13. Supporting arms 21 aremounted on the .sidesof the-bed 1 and have their upper ends detachably secured to thegbracket 18 for supporting said bracket -A transverse dovetail slide 22is provided on the upper end portion of the bracket v18 and mounted for travel in a horizontal plane thereon is a block 23 having an actuating handle 24 thereon. Spaced guide bars 25 are mountedon the block 23 through the medium of the cap screws 26 for the reception of :1

against swinging movement. A

' straight edged blade or knife 27 therebetween.

The guide bars 25 are adapted for the recep- 1 .tion therebetween'of either aright or left hand blade and'to'this end are adapted to be openings or sockets 29 provided therefor in the block 23 i for securing, the guide bars against swinging movement in the desired position, Bolts 30 clamp the blade 27 in position on the block 23 between the guide bars 25. A nut 31 depends'from the bock'6 of the carriage 5 and is operable in. theslot 4. A feed screw 32 is journaled longitudinally in the bed 1 and is threaded through the nut 31.

and fixed on one end portion of said feed screw is an actuating crank 33. As will be obvious, the elements 31, 32-and 33 provide means for shifting thecarriage 5 toward or away from the work. In use, the wheel 10 is rotated and the block 23 is manually reciprocated in a manner to move the blade 27 back and forth across said wheel 10. The wheel 10 is adjusted toward the blade as desired.

' When axconcave edged blade is to be sharpened, the grinding wheel 10 is removed and replaced by thegrinding wheel 34 and the bracket 18 is removed. A bracket 35 is mounted on the bed 1 adjacent the block 6 of the carriage 5 and mounted for swinging movement laterally in a vertical plane on the bracket 35 is an arm 36 having a dovetail slide 37 on its upper portion. A block 38 is mounted for travel on the slide 37 and has .which provides means for manually swinging said arm. Stop screws 46 are threaded through lugs provided therefor on opposite "sides ofthe lowerend portion of the arm 36 for -engagementwith the bracket '35 for limiting the swinging movement of said arm 36 in opposite directions. The lugs are designated by the reference numeral 47. Lock nuts 48 are threaded on the stop screws 46 and are engageable with the lugs 47 for securing the :stop screws in adjusted position. An adjustable gib'49 is provided in the bracket 35 for compensating forwear'." It may be well to here state that the bracket 35 is mounted on the' sli-de 3 of the bed 1'. An adjustable gib (not shown} may also be provided in the block 6 of the carriage 5 for compensating for wear between said block and the slide 3.

- For sharpening the blade 49, the wheel 34 isrotated and the arm 36 is-swung laterally in a manner to move said blade over the wheel,

as will be apparent. The blade 40 is, of course, engaged with the tapered periphery of the grinding wheel 34.

WVhen a convex edge-d blade or knife is to be sharpened, the grinding wheel 10 is used and an inclined arm 50 is mounted for swinging movement on the sleeve 13 through the medium of a pin 51 which is journaled in said sleeve. Stop lugs 52 depend from the swinging arm 50 for engagement with the stop lug '17 on the sleeve 13 for limiting the swinging movement of said arm 50.

The arm 50 is provided with a dovetail slide 53 on its. upper side upon which a block 54 is adapted to travel. A feed or adjusting screw .5.5 is journaled inabearing 56 provided therefor on the arm 50 and has fixed on its lower end an actuating knob 57. The screw is operatively connected to the block 54, as at 58. The convex edged blade 59 is removably secured in position on the block 54 by suitable bolts 60. A handle 61 projects from the lock 54 for manually swinging the blade .59 across the grinding wheel 10.

The adjustable supportingsleeve 13 provides means through the medium of which the angularity of theblades 27 and 59 relative to the grinding wheel 10 may be ad justed as desired.

It is believed that the many advantages of a machine in accordance with the present invention will be readily understood, and although the preferred embodiment of the invention is as illustrated and described, it is to be understood that changes in the details of construction and in the combination and arrangement ofparts may be resorted to which will fall within the scopeof the invention as claimed.

What is claimed is 1. A blade sharpening machine comprising a bed, a grinding wheel rotatably mounted on the bed, a pair of upstanding brackets mounted in spaced relation to eachother' on the bed, one of said brackets having a series of holes therein, a sleeve mounted for vertical swinging movement between the brackets, a pin selectively insertablethrough the holes and engageable with'the sleeve for securing the sleevein adjusted position against swinging movement, a stop lug projecting from the sleeve, an inclined arm, a pin projecting from the inclined arm and journaled in the sleeve for mounting the inclined arm for swinging movement on said sleeve, stoplugs depending from the inclined arm adjacent opposite sides of the first named lug and engageable therewith for limiting the swinging movement of saidinclined arm in opposite directions, a block slidably mounted on the inclined arm, a feed screw mounted on the inclined arm and operatively connected with the block for shifting the same, and means on the block for detachably securing the blade in position thereon for engagement with the grinding wheel.

2. A blade sharpening machine comprising a bed, a grinding wheel rotatably mounted on the bed, an inclined bracket mounted on the bed, a transverse dovetail slide on the upper end portion of the bracket, a block shiftably mounted on the slide, a handle projecting from the block for manually actuating w the same, spaced guide bars mounted for swinging adjustment on the block for the reception of the blade therebetween, means for securing the guide bars in adjusted position against swinging movement, and means D on the block for securing the blade in position thereon between the guide bars.

' 3. A blade sharpening machine comprising a bed, a dovetail slide on the bed,a carriage mounted for travel on the slide,a grinding wheel rotatably mounted on the carriage, a bracket mounted on the slide adjacent the carriage, a vertically disposed arm mounted for swinging movement on the bracket, a handle projecting from the arm for manually swinging the same, lugs projecting from opposite sides of the lower end portion of the arm, stop screws threaded through the lugs and engageable with the bracket for limiting the swinging movement of the arm in op- ,posite direction, and means for detachably mounting the blade on the arm for engagement with the grinding wheel.

In testimony whereof I aflix my signature.

ANTON M. RUNSHANG. 

